气候变化领域集成服务门户(CCPortal): Controlling interdependent meso-nanosecond dynamics and defect generation in metal 3D printing

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DOI	10.1126/science.aay7830
	Controlling interdependent meso-nanosecond dynamics and defect generation in metal 3D printing
	Khairallah S.A.; Martin A.A.; Lee J.R.I.; Guss G.; Calta N.P.; Hammons J.A.; Nielsen M.H.; Chaput K.; Schwalbach E.; Shah M.N.; Chapman M.G.; Willey T.M.; Rubenchik A.M.; Anderson A.T.; Morris Wang Y.; Matthews M.J.; King W.E.
发表日期	2020
ISSN	0036-8075
起始页码	660
结束页码	665
卷号	368 期号:6491
英文摘要	State-of-the-art metal 3D printers promise to revolutionize manufacturing, yet they have not reached optimal operational reliability. The challenge is to control complex laser–powder–melt pool interdependency (dependent upon each other) dynamics. We used high-fidelity simulations, coupled with synchrotron experiments, to capture fast multitransient dynamics at the meso-nanosecond scale and discovered new spatter-induced defect formation mechanisms that depend on the scan strategy and a competition between laser shadowing and expulsion. We derived criteria to stabilize the melt pool dynamics and minimize defects. This will help improve build reliability. Copyright © 2020 The Authors,
关键词	metal laser method metal simulation three-dimensional modeling absorption Article boiling point cooling gas flow high-fidelity simulation hydrodynamics melting point nanoanalysis pore density priority journal selective laser melting shadowing (histology)surface tension thermal diffusion three dimensional printing vapor
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133514
推荐引用方式 GB/T 7714	Khairallah S.A.,Martin A.A.,Lee J.R.I.,et al. Controlling interdependent meso-nanosecond dynamics and defect generation in metal 3D printing[J]. Science,2020,368(6491).
APA	Khairallah S.A..,Martin A.A..,Lee J.R.I..,Guss G..,Calta N.P..,...&King W.E..(2020).Controlling interdependent meso-nanosecond dynamics and defect generation in metal 3D printing.,368(6491).
MLA	Khairallah S.A.,et al."Controlling interdependent meso-nanosecond dynamics and defect generation in metal 3D printing".368.6491(2020).